We will like to create background image, set the theme, and add the Colaberry logo in our report. Note that you can use any image or theme based on your preference.
See steps below.
Step 1: Download background image and logo by click on the red 
icon.
Step 2: Click on the 'format'; icon on the home page, then click on 'Page background', then click on 'Add image', locate the image file on your computer and click open (see GIF below)
Step 3: Set 'Transparency' to 30% and 'Image fit' to Fit (see screenshot below)
Step 4: Now let us set Report theme. Click on 'View' on top of the page, then click on the dropdown list, then select the preferred Theme (see screenshot below)
Step 5: Copy and paste the logo to your dashboard page and follow the format settings shown in the screenshots below:
The best free stock of images: https://www.pexels.com/
Power BI Masterclass - beginners to advanced Microsoft Power BI Created by Dan We on www.udemy.com was a helpful tool in understanding some concepts of Power BI. Note that there are a number of other free resources out there, but you can check it out below!
https://www.udemy.com/course/power-bi-masterclass-beginners-to-advanced/